Best AI tools for< Build Voice Agent >

Retell AI provides a Conversational Voice API that enables developers to integrate human-like voice interactions into their applications. With Retell AI's API, developers can easily connect their own Large Language Models (LLMs) to create AI-powered voice agents that can engage in natural and engaging conversations. Retell AI's API offers a range of features, including ultra-low latency, realistic voices with emotions, interruption handling, and end-of-turn detection, ensuring seamless and lifelike conversations. Developers can also customize various aspects of the conversation experience, such as voice stability, backchanneling, and custom voice cloning, to tailor the AI agent to their specific needs. Retell AI's API is designed to be easy to integrate with existing LLMs and frontend applications, making it accessible to developers of all levels.

Watto AI is a platform that offers Conversational AI solutions to businesses, allowing them to build AI voice agents without the need for coding. The platform enables users to collect leads, automate customer support, and facilitate natural interactions through AI voice bots. Watto AI caters to various industries and scenarios, providing human-like conversational AI for mystery shopping, top-quality customer support, and restaurant assistance.

Cerebium is a serverless AI infrastructure platform that allows teams to build, test, and deploy AI applications quickly and efficiently. With a focus on speed, performance, and cost optimization, Cerebium offers a range of features and tools to simplify the development and deployment of AI projects. The platform ensures high reliability, security, and compliance while providing real-time logging, cost tracking, and observability tools. Cerebium also offers GPU variety and effortless autoscaling to meet the diverse needs of developers and businesses.

Millis AI is an instant, natural, and affordable voice AI platform designed for developers to create cutting-edge voice agents with low latency. The platform offers optimized conversation flow handling, affordable accessibility, seamless integration, and scalable expertise. With rates starting at $0.06/min, Millis AI enables users to build human-like voice agents that can manage interruptions and understand human intent. The platform also provides DevOps engineers' expertise in scaling systems for enterprise-level applications.

Millis AI is an advanced AI tool that enables users to effortlessly create next-gen voice agents with ultra-low latency, providing a seamless and natural conversational experience. It offers affordable pricing, integration with various services through webhooks, and the ability to connect phone numbers to AI voice agents for inbound/outbound calls in over 100 countries. With Millis AI, users can build and deploy voice agents in minutes, from no-code to low-code developers, and transform voice interactions across industries.

Insighto is an AI Agent Builder offering Conversational AI Chatbots & AI Voice Agents. It provides a complete AI-led communication solution for transforming digital customer conversations via voice and chat. The platform offers personalized support, human-like AI phone calling, and omnichannel engagement with integrated AI agents. Insighto supports over 50 languages, trainable voice agents, and a comprehensive tools library for easy integration with third-party services. It caters to various industries like healthcare, real estate, restaurants, and SaaS, enhancing efficiency and customer experience.

Synthflow is an AI phone calling platform that offers AI receptionist and answering services. It allows users to build a no-code AI phone system with AI voice agents, automate routine calls, provide 24/7 customer support, and track performance insights. The platform integrates with various CRMs, offers real-time booking, multi-human transfer, post-call actions, and custom actions. Users can manage contacts, track conversation history, and connect with systems like HubSpot, GoHighLevel, and Zoho. Synthflow is known for its white-label solution, transparent billing, and easy integrations.

Vocode is an open-source voice AI platform that enables users to build, deploy, and scale hyperrealistic voice agents. It offers fully programmable voice bots that can be integrated into workflows without the need for human intervention. With multilingual capability, custom language models, and the ability to connect to knowledge bases, Vocode provides a comprehensive solution for automating actions like scheduling, payments, and more. The platform also offers analytics and monitoring features to track bot performance and customer interactions, making it a valuable tool for businesses looking to enhance customer support and engagement.

Voiceflow is a powerful, flexible, and collaborative platform for building AI automation. It allows teams of any size to build agents of any scale and complexity, easily. Voiceflow's visual workflow builder is used by developers and designers to collaboratively create, iterate, and ship complex agents. Voiceflow also offers a central CMS for managing all of your agent content, including variables, intents, entities, and knowledge base sources. With Voiceflow, you can integrate with any API or service, share and test prototypes, and launch agents to any interface.

Bibit AI is a real estate marketing AI designed to enhance the efficiency and effectiveness of real estate marketing and sales. It can help create listings, descriptions, and property content, and offers a host of other features. Bibit AI is the world's first AI for Real Estate. We are transforming the real estate industry by boosting efficiency and simplifying tasks like listing creation and content generation.

Picovoice is an on-device Voice AI and local LLM platform designed for enterprises. It offers a range of voice AI and LLM solutions, including speech-to-text, noise suppression, speaker recognition, speech-to-index, wake word detection, and more. Picovoice empowers developers to build virtual assistants and AI-powered products with compliance, reliability, and scalability in mind. The platform allows enterprises to process data locally without relying on third-party remote servers, ensuring data privacy and security. With a focus on cutting-edge AI technology, Picovoice enables users to stay ahead of the curve and adapt quickly to changing customer needs.

Agent4 is an AI-driven virtual agent platform that allows users to create custom voice experiences for callers to their business or mobile phone. The platform enables users to build intelligent agents that can answer calls, place calls, book meetings, listen to voicemails, and provide summaries. Agent4 offers real-time call monitoring, sentiment analysis for voicemails, and filtering out robocallers. Users can customize their agents with their own content and access their systems, making it a versatile tool for various call handling tasks.

AIReception is a conversational AI voice assistant platform that allows businesses to build virtual receptionists capable of answering customer questions 24/7. The AI voice assistants are designed to replicate human speech patterns and interactions, providing a natural and immersive experience. The platform offers features such as hyper-realistic voices, human-like interaction, perfect memory, customizable responses, and call transferring. AIReception aims to enhance customer service, reduce overhead costs, and provide detailed analytics for customer interactions.

LMNT is an ultrafast and lifelike AI speech application that offers a developer API for creating conversational apps, agents, and games. It provides lifelike voices with studio-quality voice clones, engineered by an ex-Google team for reliability under pressure. Users can create engaging product marketing videos, build lightning-fast conversational experiences, and simplify content creation at scale. The application features a user-friendly interface, versatile voice cloning options, and downloadable content for easy integration into projects. With Python and Node SDKs, low latency streaming, and robust documentation, LMNT empowers developers to enhance their applications with high-quality voice synthesis.

Capacity is an AI-powered support automation platform that offers a wide range of features to streamline customer support processes. It provides self-service options, chatbots, knowledge base management, voice biometrics, CRM automation, live chat, and more. The platform is designed to enhance customer interactions, automate workflows, and improve overall efficiency in customer support operations. Capacity is trusted by over 2,000 organizations, ranging from small brands to large enterprises, and is known for its user-friendly interface and secure compliance with data protection regulations.

Caelus AI is an AI-powered tool that helps businesses acquire new users by monitoring keyword mentions of problems and competitors across Twitter and Reddit, and replying to them automatically. It uses natural language processing to understand the intent of each mention and respond in a personalized way, sounding like the business itself. Caelus AI also learns from the business's existing Twitter and Reddit posts to ensure that its responses are consistent with the brand's voice and tone.

Intimate AI Girlfriend is an AI application that offers a unique experience of interacting with AI-generated characters to build relationships, have conversations, and engage in various activities like chatting, calling, and sharing photos. The app provides a platform for users to connect with lifelike AI soulmates, create memories, and experience real intimacy in a virtual setting. With features like voice notes, voice calling, photo gallery, and NSFW chat options, Intimate aims to provide a personalized and immersive AI girlfriend experience.

MyShell is an AI application that enables users to build, share, and own AI agents. It serves as a platform connecting users, creators, and open-source AI researchers. With MyShell, users can interact with AI friends and work companions, such as Shizuku and Emma 01 03, through voice and video conversations. The application empowers creators to leverage generative AI models to transform ideas into AI-native apps quickly. MyShell fosters a creator economy in the AI-native era, allowing anyone to become a creator, take ownership of their work, and be rewarded for their ideas.

Sierra is a conversational AI platform that enables companies to build AI agents that are personalized to their business and customers. With Sierra, companies can deploy AI agents that are always available, empathetic, and aligned to their brand tone and voice. Sierra's AI agents can help customers with a variety of tasks, such as getting answers to questions, solving problems, and taking action. Sierra is trusted by leading consumer brands with millions of customers across a wide range of industries.

Hamming is an AI tool designed to help automate voice agent testing and optimization. It offers features such as prompt optimization, automated voice testing, monitoring, and more. The platform allows users to test AI voice agents against simulated users, create optimized prompts, actively monitor AI app usage, and simulate customer calls to identify system gaps. Hamming is trusted by AI-forward enterprises and is built for inbound and outbound agents, including AI appointment scheduling, AI drive-through, AI customer support, AI phone follow-ups, AI personal assistant, and AI coaching and tutoring.

LiveKit Agents for Node.js is a framework designed for building realtime, programmable voice agents that can see, hear, and understand. It includes support for OpenAI Realtime API, allowing for ultra-low latency WebRTC transport between GPT-4o and users' devices. The framework provides concepts like Agents, Workers, and Plugins to create complex tasks. It offers a CLI interface for running agents and a versatile web frontend called 'playground' for building and testing agents. The framework is suitable for developers looking to create conversational voice agents with advanced capabilities.

Bolna is an open-source platform for building voice-driven conversational applications using large language models (LLMs). It provides a comprehensive set of tools and integrations to handle various aspects of voice-based interactions, including telephony, transcription, LLM-based conversation handling, and text-to-speech synthesis. Bolna simplifies the process of creating voice agents that can perform tasks such as initiating phone calls, transcribing conversations, generating LLM-powered responses, and synthesizing speech. It supports multiple providers for each component, allowing users to customize their setup based on their specific needs. Bolna is designed to be easy to use, with a straightforward local setup process and well-documented APIs. It is also extensible, enabling users to integrate with other telephony providers or add custom functionality.

Pipecat is an open-source framework designed for building generative AI voice bots and multimodal assistants. It provides code building blocks for interacting with AI services, creating low-latency data pipelines, and transporting audio, video, and events over the Internet. Pipecat supports various AI services like speech-to-text, text-to-speech, image generation, and vision models. Users can implement new services and contribute to the framework. Pipecat aims to simplify the development of applications like personal coaches, meeting assistants, customer support bots, and more by providing a complete framework for integrating AI services.

ASTRA is an open-source platform designed for developing applications utilizing large language models. It merges the ideas of Backend-as-a-Service and LLM operations, allowing developers to swiftly create production-ready generative AI applications. Additionally, it empowers non-technical users to engage in defining and managing data operations for AI applications. With ASTRA, you can easily create real-time, multi-modal AI applications with low latency, even without any coding knowledge.

Agent Pilot is an open source desktop app for creating, managing, and chatting with AI agents. It features multi-agent, branching chats with various providers through LiteLLM. Users can combine models from different providers, configure interactions, and run code using the built-in Open Interpreter. The tool allows users to create agents, manage chats, work with multi-agent workflows, branching workflows, context blocks, tools, and plugins. It also supports a code interpreter, scheduler, voice integration, and integration with various AI providers. Contributions to the project are welcome, and users can report known issues for improvement.

Vocode is an open source library that enables users to easily build voice-based LLM (Large Language Model) apps. With Vocode, users can create real-time streaming conversations with LLMs and deploy them for phone calls, Zoom meetings, and more. The library offers abstractions and integrations for transcription services, LLMs, and synthesis services, making it a comprehensive tool for voice-based applications.

Vocode is an open source library that enables users to build voice-based LLM (Large Language Model) applications quickly and easily. With Vocode, users can create real-time streaming conversations with LLMs and deploy them for phone calls, Zoom meetings, and more. The library offers abstractions and integrations for transcription services, LLMs, and synthesis services, making it a comprehensive tool for voice-based app development. Vocode also provides out-of-the-box integrations with various services like AssemblyAI, OpenAI, Microsoft Azure, and more, allowing users to leverage these services seamlessly in their applications.

Astra.ai is a multimodal agent powered by TEN, showcasing its capabilities in speech, vision, and reasoning through RAG from local documentation. It provides a platform for developing AI agents with features like RTC transportation, extension store, workflow builder, and local deployment. Users can build and test agents locally using Docker and Node.js, with prerequisites including Agora App ID, Azure's speech-to-text and text-to-speech API keys, and OpenAI API key. The platform offers advanced customization options through config files and API keys setup, enabling users to create and deploy their AI agents for various tasks.

ai-collective-tools is an open-source community dedicated to creating a comprehensive collection of AI tools for developers, researchers, and enthusiasts. The repository provides a curated selection of AI tools and resources across various categories such as 3D, Agriculture, Art, Audio Editing, Avatars, Chatbots, Code Assistant, Cooking, Copywriting, Crypto, Customer Support, Dating, Design Assistant, Design Generator, Developer, E-Commerce, Education, Email Assistant, Experiments, Fashion, Finance, Fitness, Fun Tools, Gaming, General Writing, Gift Ideas, HealthCare, Human Resources, Image Classification, Image Editing, Image Generator, Interior Designing, Legal Assistant, Logo Generator, Low Code, Models, Music, Paraphraser, Personal Assistant, Presentations, Productivity, Prompt Generator, Psychology, Real Estate, Religion, Research, Resume, Sales, Search Engine, SEO, Shopping, Social Media, Spreadsheets, SQL, Startup Tools, Story Teller, Summarizer, Testing, Text to Speech, Text to Image, Transcriber, Travel, Video Editing, Video Generator, Weather, Writing Generator, and Other Resources.

Alan AI SDK for iOS is a powerful tool that allows developers to quickly create AI agents for their iOS apps. With Alan AI Platform, users can easily design, embed, and host conversational experiences in their applications. The platform offers a web-based IDE called Alan AI Studio for creating dialog scenarios, lightweight SDKs for embedding AI agents, and a backend powered by top-notch speech recognition and natural language understanding technologies. Alan AI enables human-like conversations and actions through voice commands, with features like on-the-fly updates, dialog flow testing, and analytics.

SalesGPT is an open-source AI agent designed for sales, utilizing context-awareness and LLMs to work across various communication channels like voice, email, and texting. It aims to enhance sales conversations by understanding the stage of the conversation and providing tools like product knowledge base to reduce errors. The agent can autonomously generate payment links, handle objections, and close sales. It also offers features like automated email communication, meeting scheduling, and integration with various LLMs for customization. SalesGPT is optimized for low latency in voice channels and ensures human supervision where necessary. The tool provides enterprise-grade security and supports LangSmith tracing for monitoring and evaluation of intelligent agents built on LLM frameworks.

This repository provides a sample solution for building generative AI agents using Amazon Bedrock, Amazon DynamoDB, Amazon Kendra, Amazon Lex, and LangChain. The solution creates a generative AI financial services agent capable of assisting users with account information, loan applications, and answering natural language questions. It serves as a launchpad for developers to create personalized conversational agents for applications like chatbots and virtual assistants.

LLMWare is a framework for quickly developing LLM-based applications including Retrieval Augmented Generation (RAG) and Multi-Step Orchestration of Agent Workflows. This project provides a comprehensive set of tools that anyone can use - from a beginner to the most sophisticated AI developer - to rapidly build industrial-grade, knowledge-based enterprise LLM applications. Our specific focus is on making it easy to integrate open source small specialized models and connecting enterprise knowledge safely and securely.

ChatPilot is a chat agent tool that enables AgentChat conversations, supports Google search, URL conversation (RAG), and code interpreter functionality, replicates Kimi Chat (file, drag and drop; URL, send out), and supports OpenAI/Azure API. It is based on LangChain and implements ReAct and OpenAI Function Call for agent Q&A dialogue. The tool supports various automatic tools such as online search using Google Search API, URL parsing tool, Python code interpreter, and enhanced RAG file Q&A with query rewriting support. It also allows front-end and back-end service separation using Svelte and FastAPI, respectively. Additionally, it supports voice input/output, image generation, user management, permission control, and chat record import/export.

RAI is a framework designed to bring general multi-agent system capabilities to robots, enhancing human interactivity, flexibility in problem-solving, and out-of-the-box AI features. It supports multi-modalities, incorporates an advanced database for agent memory, provides ROS 2-oriented tooling, and offers a comprehensive task/mission orchestrator. The framework includes features such as voice interaction, customizable robot identity, camera sensor access, reasoning through ROS logs, and integration with LangChain for AI tools. RAI aims to support various AI vendors, improve human-robot interaction, provide an SDK for developers, and offer a user interface for configuration.

Awesome Agents is a curated list of open source AI agents designed for various tasks such as private interactions with documents, chat implementations, autonomous research, human-behavior simulation, code generation, HR queries, domain-specific research, and more. The agents leverage Large Language Models (LLMs) and other generative AI technologies to provide solutions for complex tasks and projects. The repository includes a diverse range of agents for different use cases, from conversational chatbots to AI coding engines, and from autonomous HR assistants to vision task solvers.

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